. "DISTRIBUTED CONTROL OF STOCHASTIC ELLIPTIC SYSTEMS INVOLVING LAPLACE OPERATOR Vol. 5(2) July 2017, No. 18, pp. 191-199 A. S. OKB EL BAB, ABD-ALLAH HYDER AND A. M. ABDALLAH", Electronic Journal of Mathematical Analysis and Applications, 5, 2, 2017, -. doi: 10.21608/ejmaa.2017.310984